Fabbics



STATES PATENT OFFICE.

HERBERT P. PEARSON, OF YORK, N. Y., ASSIGNOR '10 PEARSON PRODUCTS CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

neonate.

No Drawing.

To all whom it may concern:

Be it known that I, HERBERT P. PEARSON,

a subject of the United Kingdom of Great Britain, residing at two hundred West Sewenty-eighth street, in the county of New York and State of New York, have invented certain new and useful Improvements in Methods of Waterproofin Fabrics, of which the following is a speci cation.

This invention relates to the water-proof finishing of textile fabrics and wearing apparel, including such avariety as felt hats and ostrich feathers, and more especially to the production of unproved transparent, senn-transparent or invisible water-proofcoatings on the fibers of the same through the agency of a compound of semi-solid and .solid hydro-carbons in conjunction with siccative oils treated with selenium salts. Heretofore it has been customary in this field to make use of the solid residues of petroleum, basic salts offatty acids/and insoluble mineral salts, to all of which objection has been raised that they either stifi'en the fiber or give the fabric aharsh handle when used in sufficient quantities to produce the desired resistance to water, and moreover that they are subject to physical or chemical changes during those finishing operations emp oying great heat which are applied to textile fabrics and Wearing ap parel.

It has been regarded as desirable in the water-proof finishing of textile fabrics and Wearing apparel to secure prevention of the stiffening of the fabric while producing the maximum resistance to wetting by water. To this end I make use in the present invention of compounds composed of solid hydro-carbons and petroleum residues preferably paraflin waxes of melting point below 135 degrees Fahrenheit, in conjunction with a petrolatum free from mineral oils of light gravity and in con unction with a siccative oil preferably Chinese wood oil or Perrilla oil treated with a selenium salt or with seleniumoxid.

The addition of vegetable drying OllS' Specification of Letters Patent. Patented June 24, 1919,

. Application filed April 3.1919. Serial rm. 287.194.

alone to textile fabrics has resulted in the slow oxidation of the oils: with the formaof the fiber resultingafter drying. By the addition of selenium compounds to the sicc-ative oils 1 have destroyed the tendency of the oils to dry and-caused them to form a soft, elastic, slowly oxidizable complex, that in conjunction with solid viscous or semi-solid petroleum residues produces a masssoluble in petroleum distillates which has valuable water-proofing properties in the treatment of textile fabrics and wearing appareh I am unable to state whether the combinations taking place between the selenium treated siccative oils and the petroleum residues are actual chemical compounds or whether the occlusive action of the selenium tungates (in the case of Chine'se wood oil) is responsible for the composition of the resulting body. The action ma be chemical or adsorptive tion of linoxyns, which end products I regard as undesirable because of the stifiening.

a The compositions embodied under my invention are therefore those which comprise parafiins and petrolatums intimately associated with-selenium tungate in laser proportion. I realize that the composition may be greatly varied and still satisfy the specific conditions mentioned above and all such variation I regard as within the scope of my invention.

"A formula indicative of'the present invention is as follows 80 lbs. of paratlin wax of 122 degrees Fahrenheit melting point, and 20 lbs. of petrolatu-m, thoroughly mixed and combined under heat with 8 lbs. of Chinese wood oil previously treated with 1% of selenium oxid. The process-of treating the Chinese wood oil is as follows: The oil is heated to a temperature of 400 degrees Fahrenheit when the selenium oxid is added and for two hours the oil is slowly raised with stir "ring to a temperature not exceeding 550 degrees Fahrenheit,'the entire mass being then allowed to cool to room temperature.

My compositions may be applied with a.

brush or dissolved in a suitable solvent and. the fabric impregnated therewith or applied with a spray or by means of spreading rollers.

I claim:

1. The process of water-proof finishing textile fabrics and wearing apparel which comprises their treatment with paraflin wax in conjunction with petrolatum and a selenium treated Chinese wood oil.

2. The prowess of water-proof finishing textile fabrics and Wearing apparel which comprises their treatment with solutions in Volatile solvents of paraifin wax, petrolatum' and selenium treated Chinese wood oil.

' HERBERT P. PEARSON 

